1 /**************************************************************************/
2 /* */
3 /* Copyright (c) Microsoft Corporation. All rights reserved. */
4 /* */
5 /* This software is licensed under the Microsoft Software License */
6 /* Terms for Microsoft Azure RTOS. Full text of the license can be */
7 /* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
8 /* and in the root directory of this software. */
9 /* */
10 /**************************************************************************/
11
12
13 /**************************************************************************/
14 /**************************************************************************/
15 /** */
16 /** GUIX Component */
17 /** */
18 /** Screen Management (Screen) */
19 /** */
20 /**************************************************************************/
21
22 #define GX_SOURCE_CODE
23
24
25 /* Include necessary system files. */
26
27 #include "gx_api.h"
28 #include "gx_system.h"
29 #include "gx_utility.h"
30 #include "gx_display.h"
31 #include "gx_canvas.h"
32
33 /**************************************************************************/
34 /* */
35 /* FUNCTION RELEASE */
36 /* */
37 /* _gx_canvas_pixelmap_draw PORTABLE C */
38 /* 6.1 */
39 /* AUTHOR */
40 /* */
41 /* Kenneth Maxwell, Microsoft Corporation */
42 /* */
43 /* DESCRIPTION */
44 /* */
45 /* This function prepares to draw the specified pixelmap at the */
46 /* requested position. */
47 /* */
48 /* INPUT */
49 /* */
50 /* x_position Top-left x-coord to place */
51 /* pixelmap */
52 /* y_position Top-left y-coord to place */
53 /* pixelmap */
54 /* pixelmap Pointer to actual pixelmap */
55 /* to draw */
56 /* */
57 /* OUTPUT */
58 /* */
59 /* status Completion status */
60 /* */
61 /* CALLS */
62 /* _gx_utility_rectangle_define Define a rectangle */
63 /* _gx_utility_rectangle_overlap_detect Detect rectangle overlap */
64 /* [gx_display_driver_pixelmap_draw] The display driver pixelmap */
65 /* draw routine */
66 /* [gx_display_driver_jpeg_draw] The display driver JPEG draw */
67 /* routine */
68 /* [gx_display_driver_png_draw] The display driver PNG draw */
69 /* routine */
70 /* */
71 /* CALLED BY */
72 /* */
73 /* _gx_canvas_pixelmap_blend */
74 /* _gx_canvas_pixelmap_tile */
75 /* _gx_checkbox_draw */
76 /* _gx_icon_button_draw */
77 /* _gx_icon_draw */
78 /* _gx_pixelmap_button_draw */
79 /* _gx_pixelmap_prompt_draw */
80 /* _gx_pixelmap_slider_draw */
81 /* _gx_radio_button_draw */
82 /* _gx_scroll_thumb_draw */
83 /* _gx_scrollbar_draw */
84 /* _gx_window_draw */
85 /* _gx_scroll_thumb_draw */
86 /* */
87 /* RELEASE HISTORY */
88 /* */
89 /* DATE NAME DESCRIPTION */
90 /* */
91 /* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
92 /* 09-30-2020 Kenneth Maxwell Modified comment(s), */
93 /* resulting in version 6.1 */
94 /* */
95 /**************************************************************************/
_gx_canvas_pixelmap_draw(GX_VALUE x_position,GX_VALUE y_position,GX_PIXELMAP * pixelmap)96 UINT _gx_canvas_pixelmap_draw(GX_VALUE x_position, GX_VALUE y_position, GX_PIXELMAP *pixelmap)
97 {
98 GX_DRAW_CONTEXT *context;
99 GX_DISPLAY *display;
100 GX_RECTANGLE clip_rect;
101 GX_RECTANGLE bound;
102 GX_VIEW *view;
103 VOID (*pmp_function)(GX_DRAW_CONTEXT *, INT, INT, GX_PIXELMAP *);
104
105 /* pick up the current drawing context */
106 context = _gx_system_current_draw_context;
107
108 /* pick up current display driver */
109 display = context -> gx_draw_context_display;
110
111 /* calculate rectangle that bounds the pixelmap */
112 _gx_utility_rectangle_define(&bound, x_position, y_position,
113 (GX_VALUE)(x_position + pixelmap -> gx_pixelmap_width - 1),
114 (GX_VALUE)(y_position + pixelmap -> gx_pixelmap_height - 1));
115
116 /* clip the line bounding box to the dirty rectangle */
117 if (!_gx_utility_rectangle_overlap_detect(&bound, &context -> gx_draw_context_dirty, &bound))
118 {
119 /* nothing to draw, return */
120 return GX_SUCCESS;
121 }
122
123 /* pickup pointer to correct pixelmap drawing function */
124 pmp_function = GX_NULL;
125
126 if (pixelmap -> gx_pixelmap_flags & GX_PIXELMAP_RAW_FORMAT)
127 {
128 #if defined(GX_SOFTWARE_DECODER_SUPPORT)
129 if ((pixelmap->gx_pixelmap_data[0] == 0xff) && (pixelmap->gx_pixelmap_data[1] == 0xd8))
130 {
131 /* JPEG */
132 pmp_function = display -> gx_display_driver_jpeg_draw;
133 }
134 else
135 {
136 if (pixelmap -> gx_pixelmap_data[1] == 'P')
137 {
138 /* PNG */
139 pmp_function = display -> gx_display_driver_png_draw;
140 }
141 }
142 #endif
143 }
144 else
145 {
146 if (pixelmap -> gx_pixelmap_format == GX_COLOR_FORMAT_8BIT_ALPHAMAP)
147 {
148 pmp_function = display -> gx_display_driver_alphamap_draw;
149 }
150 else
151 {
152 pmp_function = display -> gx_display_driver_pixelmap_draw;
153 }
154 }
155
156 if (!pmp_function)
157 {
158 /* display driver does not support requested action */
159 return GX_FAILURE;
160 }
161
162 /* test to determine if the bounding rectangle overlaps the region we are allowed to draw
163 into. For each view that overlaps the bounding rectangle, do some drawing.
164 */
165 view = context -> gx_draw_context_view_head;
166
167 while (view)
168 {
169 if (!_gx_utility_rectangle_overlap_detect(&view -> gx_view_rectangle, &bound, &clip_rect))
170 {
171 view = view -> gx_view_next;
172 continue;
173 }
174
175 /* we have a view into which we can draw the pixelmap, do it */
176
177 /* first, set the context clip rectangle */
178 context -> gx_draw_context_clip = &clip_rect;
179
180 /* now pass the context and drawing params to driver level function */
181 pmp_function(context, x_position, y_position, pixelmap);
182
183 /* go to the next view */
184 view = view -> gx_view_next;
185 }
186
187 /* Return successful completion. */
188 return(GX_SUCCESS);
189 }
190
191
